.\" -*- nroff -*-
.\" Copyright 2013 Los Alamos National Security, LLC. All rights reserved.
.\" Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.\" Copyright (c) 2010 Cisco Systems, Inc.  All rights reserved.
.\" $COPYRIGHT$
.TH MPI_T_category_changed 3 "Jun 10, 2020" "4.0.4" "Open MPI"
.
.SH NAME
\fBMPI_T_category_changed\fP \- Get a timestamp for the categories
.
.SH SYNTAX
.ft R
.
.SH C Syntax
.nf
#include <mpi.h>
int MPI_T_category_changed(int *\fIstamp\fP)

.fi
.SH INPUT PARAMETERS
.ft R
.TP 1i
stamp
A virtual time stamp to indicate the last change to the categories.

.SH DESCRIPTION
.ft R
If two subsequent calls to this routine return the same timestamp, it is guaranteed that
no categories have been changed or added. If the timestamp from the second call is
higher than some categories have been added or changed.

.SH ERRORS
.ft R
MPI_T_category_changed() will fail if:
.TP 1i
[MPI_T_ERR_NOT_INITIALIZED]
The MPI Tools interface not initialized
